$().ready(function() {
  $('[type="file"]').change(function() {
    var fileInput = $(this);
    if (fileInput.length && fileInput[0].files && fileInput[0].files.length) {
      var url = window.URL || window.webkitURL;
      var image = new Image();
      image.onload = function() {
        alert('Valid Image');
      };
      image.onerror = function() {
        alert('Invalid image');
      };
      image.src = url.createObjectURL(fileInput[0].files[0]);
    }
  });
});